榫卯侧向紧密度对台阶透榫节点抗震性能影响试验研究  

Tests for effects of lateral tenon and mortise tightness on aseismic performance of step through tenon joints

作　　者：苏海红[1,2] 高永林 陶忠 苏何先 张庆 SU Haihong;GAO Yonglin;TAO Zhong;SU Hexian;ZHANG Qing(Faculty of Management and Economics,Kunming University of Science and Technology,Kunming 650500,China;Faculty of Architecture and Urban Planning,Kunming University of Science and Technology,Kunming 650500,China;Earthquake Engineering Institute,Yunnan province,Kunming 650500,China)

机构地区：[1]昆明理工大学管理与经济学院,昆明650093 [2]昆明理工大学建筑与城市规划学院,昆明650500 [3]云南省工程抗震研究所,昆明650500

出　　处：《振动与冲击》2020年第15期142-149,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金(51868032,51168025);省级项目(人培)(KKSY201813008)。

摘　　要：制作卯口为定值、榫头宽度不同的台阶透榫节点模型,将节点模型分为宽松、适中和过紧3个模型。通过低周反复加载试验研究榫卯节点榫头与卯口侧向间紧密度对榫卯节点抗震性能的影响。同时通过采用简易云纹技术(在榫头受力部位画出5 mm×5 mm方格网),观察试验过程中榫头发生嵌压破坏的现象及过程。结果表明:紧密程度对节点耗能、极限承载力、初始刚度和延性具有较大影响,榫卯越紧密,脆性特征越明显。极限承载力大小关系:过紧节点模型>适中节点模型>宽松节点模型;初始刚度大小关系:过紧节点模型>适中节点模型>宽松节点模型;等效黏滞阻尼系数大小关系:适中节点模型>过紧节点模型>宽松节点模型;过紧的榫卯节点模型延性差,脆性特征明显,极限转角正向仅为0.08 rad,反向0.06 rad,而宽松、适中节点模型最小极限转角均达到了0.12 rad。Here, 3 models for step through tenon joints with a certain mortise and different tenon widths including tight joint model, moderate one and loose one were fabricated. Low-cyclic reversed loading tests were conducted to study effects of lateral tenon and mortise tightness on aseismic performance of 3 models. At the same time, using the simple moire technique(5 mm×5 mm square grid), phenomenon and process of inlay failure of tenon during tests were observed. Results showed that the lateral tightness has larger effects on joint energy-dissipation, ultimate load-bearing capacity, initial stiffness and ductility, the tighter the mortise and tenon, the more obvious the brittle feature;ultimate bearing capacity of tight joint model > that of moderate joint one > that of loose joint one;initial stiffness of tight joint model > that of moderate joint one > that of loose joint one;equivalent viscous damping coefficient of moderate joint model > that of tight joint one > that of loose joint one;ductility of tight joint model is bad, while that of loose joint one is good.

关 键 词：台阶透榫节点 紧密程度 低周反复加载试验 抗震性能 

分 类 号：TU375.4[建筑科学—结构工程]